Manufacture of vat coloring matters



Patented May 26, 1925 UNITED STAT S Puma PAUL mm m mi saunwm, or nunwmsmnu-on-mnnmn, GEB- 7 mun, assronons 1'0 namscnn ANILIN- OFFICE.

& sons-rum, or nunwrosmmr ON-THE-RHINE, em, a ooaroaarrox or GERMANY.

muracrunn of var comma m'r'rnns.

No Drawing.

in which formula A and A are anthraquinone residues, represent valuable vat coloring matters provided one of these anthraquinone residues, or both, contain an am no group or more than one amino group, which may be either a primary amino group or substituted by any radical other than an anthraquinone carboxylic acid residue. Other substituents may also be present in the an- These vat colorin matters generally produce red shades, ut other colors, such as orangeand violet, may also be obtained. They produce dee dyemgs with very good, in some cases exce lent fastness. The roducts of the aforesaid kind may be pro need in various ways following the generally known methods. They may be prepared by the interaction of an amino-anthraquinonc (whether substituted in the nucleus, or not) and an amino-anthraquinone carboxylic acid or its chlorid, which reaction may take place while employing condensing agents.

thraquinone residues or either of them.,

\ Application fled October 23, 1923. Serial No. 670,243.

And anthraquinone carbo lic acid (or its chlorid) or an amino-anllhraquinone con-' taining an interchangeable group may be condensed to form the body A-CO-NH A, replacing subsequently the interchangeable group (such as halogen) b the amino group or, if a nitro group, re ucing it to forman amino group, or the body A-CO NH-A' may be nitrated, and the nitro compound thus obtained reduced. Another way of producing the desired amino derivative consists in causing an anthraquinone derivative containing a reactive on to react with an anthraquinone-caribny amid, but any other suitable method may also be used.

The following examples serve to further illustrate the invention which lfittOlQllOW- ever, is not restricted to these examples. The parts are by weight.

Example 1.

10.6 parts of 1-aminoanthra quinone-2- carboxylic acid and 300 parts of nitrobenzene are heated to about 100'degrees centigrade, 9 parts of phosphorus pentachlorid are then added, whereupon a disengagement l-amlno-anthroqulnono-Zcarboxylic acid @ffl lamino-anthrziquinonoZ-carboryllc acid chlorid lemlno-anthnqulnmc Ewample 2.

22.3 parts of l-aminoanthraquinone are dissolved in 150 parts of boiling nitroben- 8 zene, and 30.5 parts of l-chloro-anthraquinone-2-carbonyl chlorid are then added.

The mixture iskept at boiling point for af i a:

resented by the following equations with structural formulas:

roduct filtered Woo/J toluenopan-aullonamld NH 80: 5GB;

00 N 00g 13 no] i 1 co aaponlled I oo N Example 3.

parts of the condensation product/of 1-chloro-anthraquinone-Q-carboxylic a c i d chlorid and 2-aminoanthraquinone prepared 40 in an analogous manner as described in Exco cog I} Ham-0.114.021,

ample 2 are heated, in an autoclave provided with a stirrer, to 160 degrees centigrade, with 300 parts of aqueous ammonia of 20 per cent and 0.5 parts of cuprous chlorid. When cool, the reaction product is filtered off, washed and dried and recrys- The formation of the dyestufi described in tallized from It is a vat coloring this example is represented by the follow- 5 matter dyeing cotton bluish red shades. ing equations with structural formulas:

Ucpw oin 7 x I Ginm 1U a Ewampk 4. reduce the nitro group. It cotton clear bluish red shades. 5 parts of 1-amino-4-methoxy-anthraqui- With 1-amino-8-hydroxy-anthraquinone none are dissolved in 60 parts of boiling instead of 1-amino-4-methoxy-anthraquinitrobenzene and 6.2 parts of l-nitro-an none a bright orange dyestufi is obtained, thraquinone-2-carboxylic acid chlorid addand with 1.5-diamino?4.8-dihydroxy-anthraed thereto. The mixture is boiled for quinone a violet coloring matter, with 1.4- minutes, then cooled, the reaction product diamino-anthraquinone a claret red vat dye- 15 filtered off, washed with benzene and dried. stufi. The formation of the dyestufi de- The product can directly serve as a. vat scribed in this example is represented by coloring matter or preferably it is beforethe following equations with structural forhand subjected to a reduction treatment to mulas: 0

reduced HCl OCH;

- boxylic acid, 1500 With 1.5-diamino -ifi-dihydroxy-anthra quinone the equation is-as follows; I

- subse uentl; reducing -NO, (twice) to N 2 (tw ce). Example-5.

5 24- parts' of l-nitro-i-amino-anthra' uinone are dissolved in 500 parts of boiling trichlorbenzene and 27 parts of anthraquinone-2-carboxylic acid nchlorid added at m1, creofijijjij NH-CO reduced 1 to have NE, in N0:

, Example 6.

107 parts of 1-amino-anthraquinone-2-carparts of trichlorbenzene and parts of thionylchlorid are stirred at.

' between degrees and degrees centigrade for half an hour. The temperature is 25 ing a current of air through :the mixture then raised to about degrees while passuntil the sulfur dioxid disengaged by the reaction is expelled, whereupon 48 parts of 1.5-diaminoanthraquinone are added. The

temperature is then raised to degrees Centigrade and maintained there for two hours. Then the mass is cooled, the reaction product filtered ofi, washed and dried. It 1s a dark red lpiowder forming a reddishbrown hydros'u te vat and dyeing cotton red shades of excellent fastness to 1i ht. The formation of the dyestufi describe in this example is represented by the following equations with structural formulas:

.We claim:

1. As new articles of manufacture, vat coloring matters of the anthroquinone series representing anthraquinone carboxylic acid amids with a hydrogen atom of the amid 10 group substituted by an anthraquinone residue and besides containing in'one of the anthratfilinone residues a group NHR in which is a hydrogen atom or a radical other than an anthraquinone carboxylic acid 16 residue, which coloring matters produce from orange to violet, but generall reddish shades, and dissolves in alkaline ydrosuL fite solution brownish-red and are decomposed by boiling with alcoholic potassium 2 hydroxid solution.

2. As a new article of manufacture, a vat coloring matter of the anthraquinone series which is 1.5-diaminoanthraquinone with each amino group substituted by a residue of 1-aminoanthraquinone-2-carboxylic acid,

which product dyes cotton, from a brownred hydrosulfite vat, fast red shades and which on boiling with alcoholic potassium PAUL NAWIASKY. KARL SAURWEIN. 

